JP5701781B2 - Shaving device with improved contour following - Google Patents

Description

The present invention is a shaving head for use in a shaving apparatus for removing the hair from the skin by cutting the hair, comprising at least one cutting unit and a holding part for holding the cutting unit The holding portion is configured to be attached to a main body portion of the shaving device, and the main body portion is configured to be held by a user of the shaving device and various types of the shaving device. Functions to house the member,
The cutting unit is configured to contact the skin during a shaving operation and has an external cutting member having a surface with an opening for passing hair, the cutting unit further on the surface of the external cutting member An internal cutting member that is drivable for movement along the opening and configured to cut hair during such movement, the external cutting member being attached to the holding portion by suspension means; Suspended from the suspension means,
A suspension member;
A pivot structure that allows the suspension member to pivot relative to the holding portion;
It relates to the shaving head which has.

  Furthermore, the present invention provides a shaving device for removing the hair from the skin by cutting the hair, which is configured to be held by a user of the shaving device and accommodates various members of the shaving device. The present invention relates to a shaving apparatus having a main body portion that functions as described above and the above-described shaving head.

  A shaving device having a main body part, at least one cutting unit and a holding part as described above is known from International Patent Application Publication No. WO2006 / 067721. The shaving device is a so-called rotary shaving device, i.e. a shaving in which the internal cutting member has an annular support with several cutting blades and the support is driven to rotate during operation of the shaving device. Device. In the example known from International Patent Application Publication No. WO2006 / 067721, the shaving head of the shaving device comprises three cutting units. The external cutting member of the cutting unit functions to cover the internal cutting member and is intended to be used for a skin contact portion to be subjected to a shaving operation. It has a cap-like shape with an opening for passing hair through the cutting blade. It will be understood that the main function of the external cutting member is to prevent direct contact between the cutting blade of the internal cutting member and the skin part, so that skin damage is prevented. .

  The shaving device has means such as a motor for driving the internal cutting member. Appropriate use of the shaving device includes moving the shaving device so that the surface of the external cutting member moves to slide over the skin. In this process, hairs protruding from the skin are continuously captured in the opening of the external cutting member, and as soon as these hairs hit the moving cutting member of the internal cutting member, both ends of the opening of the external cutting member are here It functions as an opposite cutting end.

  In each of the cutting units, the external cutting member is suspended from the holding part by the suspension member. The suspension member is generally circular and can be tilted with respect to the holding portion about the tilt axis. Three cutting units are symmetrically arranged around the central axis, and means for driving the internal cutting member of the cutting unit includes a central driving shaft, a gear arranged on the driving shaft, and a cutting unit for each cutting unit. Has gears. The central gear is configured to engage and drive all three gears of the cutting unit. The inclination axis of the suspension member of the cutting unit extends to a region where the gear of the cutting member engages with the central gear, that is, a region closer to the periphery of the cutting unit than the center position.

  Although the use of a shaving device known from International Patent Application Publication No. WO2006 / 067721 gives excellent shaving results, there is a need for further improvement. The shaving device is believed to have several drawbacks. For example, when the shaving device is applied to a shaving operation on the face, following the contour of the face includes a movement of tilting the suspension member of the cutting unit about the tilt axis. In this process, the reaction to the skin includes the effect of slipping and is thought to result in frequent changes between skin stretching and compression. Furthermore, it is believed that there is a non-uniform skin pressure distribution between the skin and the cutting unit. It is also possible to simply follow closely the contour of the unevenness.

  It is an object of the present invention to improve the shaving results and sensations experienced by users of shaving devices by eliminating the above-mentioned drawbacks. The object is to provide a first pivoting means for suspending an external cutting member relative to the holding part of the shaving head so that said suspension member and said suspension member are pivotable relative to the holding part. In addition to the structure, the external cutting member has a second pivoting structure that can pivot with respect to the suspension member, and the pivoting rigidity of the second pivoting structure is the second pivoting This is accomplished by providing a shaving head that is less than the pivotal stiffness of the structure.

  For clarity, the pivot stiffness is directly related to the tilt momentum required to achieve the tilt angle defined in the pivot structure. The higher the tilting momentum required to achieve the defined tilt angle, the higher the pivot stiffness. This can be achieved based on the steep relationship between tilt momentum and tilt angle, but there is a tilt momentum threshold required before tilt motion and tilt angle are actually realized. Also good. In such a case, according to the present invention, the above-described threshold is lower for the second pivot structure than for the first pivot structure. An example with a threshold of tilt momentum can be shown as prestress in a pivot connection, where high momentum is needed to move a pivotally positioned member from a predetermined rest position Increases the pivoting stiffness.

  Compared to the shaving head of the shaving device known from WO 2006/067721, the at least one cutting unit of the shaving head according to the invention has a first pivot for realizing a pivoting structure of the suspension member relative to the support. It has not only a moving structure but also a second pivoting structure for realizing a pivoting structure of the external cutting member with respect to the suspension member.

  Within the scope of the present invention, the number of pivot structures of the suspension member may be any desired number. In a practical embodiment of the shaving head according to the invention, there may be at least one additional suspension member in addition to the suspension member arranged on the side of the holding part. Hereinafter, for the sake of clarity, the suspension member disposed on the side surface of the holding portion is referred to as a basic suspension member. When the suspension means has two or more suspension members, the suspension member disposed on the side surface of the external cutting member is called an end suspension member, and the basic suspension member and any other suspension members of the end suspension member It is called an intermediate suspension member.

  For example, the suspension means of the shaving head according to the invention may have two suspension members, in which case the end suspension member is pivotable relative to the basic suspension member by the second pivoting structure defined above. It is. According to another possibility within the scope of the invention, the suspension means has three pivot structures and two suspension members, wherein the end suspension member is relative to the basic suspension member by the second pivot structure. And the external cutting member is pivotable relative to the end suspension member by the third pivot structure, the pivot stiffness of the second pivot structure and the pivot of the third pivot structure. Both dynamic stiffness is lower than the pivot stiffness of the first pivot structure.

  In any case, the suspension means having at least two pivoting structures makes it possible to have an inclined axis having a somewhat central position in the cutting unit and relatively close to the skin level. Therefore, the use of at least one additional pivoting structure can solve most of the problems mentioned above, in particular the sliding effect on the skin and the uneven pressure distribution on the cutting unit. Furthermore, by ensuring that the pivotal stiffness of the pivotal structure other than the first pivotal structure is lower than the pivotal stiffness of the first pivotal structure, the contour following function of the cutting unit is more than expected. To be improved. This means that the momentum required to rotate a member suspended with low pivot stiffness is lower than the momentum required to rotate a member with high pivot stiffness, and therefore the user's skin. Excellent contour following function in a region of relatively small curvature change such as in the cheek or neck region, and excellent contour following function in a region of large curvature change such as between the cheek region and the neck region. This is explained by the observation that it is possible to demonstrate both.

  Overall, the contour following is surprisingly improved when the present invention is applied. Furthermore, it is possible to realize a situation where the skin pressure required for the optimum shaving capability of the shaving device does not depend much on the user. Also, if the tilt axis of the at least one additional pivot structure extends near the skin level, the sensitivity to friction between the skin and the cutting unit is relatively low, and the various pivot axes When the tilt axes extend in different directions, a more uniform skin contact can be obtained.

  In a practical embodiment of the shaving head according to the invention having at least two suspension members, the suspension members are connected to each other in a concentric arrangement at two locations that define an inclination axis of the suspension member relative to each other. Has a ring. In other words, the suspension members can be interconnected in a kind of cardanic configuration. Having the suspension means in such a configuration is a very practical way to achieve the desired tilt axis and degree of freedom in the suspension of the external cutting member and the associated internal cutting member.

  It is also possible for the end suspension member to cover at least part of the other suspension member. The advantage of such a configuration is that the feel of the cutting unit is improved, assuming that the outer cutting member is surrounded by various suspension members. In such a situation, based on the cover function of the end suspension member, the user of the shaving device having the shaving head according to the present invention will experience a smoother surface than the surface where the transition exists between the various suspension members. Is realized.

  The present invention is very suitably applicable in the field of rotary shaving devices, that is, shaving devices in which at least one internal cutting member is configured to be rotatable. However, this does not overturn the fact that types of movement of the internal cutting member other than rotational movement are also feasible within the scope of the present invention.

  The above and other aspects of the present invention will become apparent from and will be elucidated with reference to the following detailed description of a shaving device and, in particular, a shaving head cutting unit for use in a shaving device.

  The invention will now be described in more detail with reference to the drawings, in which identical or similar parts are denoted by the same reference symbols.

1 schematically shows a perspective view of a shaving device known per se. 1 schematically shows a perspective view of a shaving head according to the present invention. Fig. 2 schematically shows a perspective view of a part of a cutting unit of a shaving head according to the present invention. Fig. 5 shows the freedom of movement of the cutting unit of the shaving head according to the present invention. FIG. 6 schematically illustrates an alternative shaving head view in which the end suspension member of the cutting unit is configured to cover a portion of the basic suspension member. FIG. 6 schematically illustrates an alternative shaving head view in which the end suspension member of the cutting unit is configured to cover a portion of the basic suspension member. Fig. 6 schematically shows a view of another alternative shaving head in which the end suspension member of the cutting unit is configured to completely cover the basic suspension member Fig. 6 schematically shows a view of another alternative shaving head in which the end suspension member of the cutting unit is configured to completely cover the basic suspension member Fig. 6 schematically shows a view of another alternative shaving head in which the end suspension member of the cutting unit is configured to completely cover the basic suspension member

  FIG. 1 shows a conventional shaving device 1 known from the international patent application publication WO2006 / 067721. The shaving device 1 is a rotary shaving device in which a shaving operation is realized by using rotating components. Another well-known type of shaving device is a device in which a shaving operation is realized by utilizing reciprocating components. It should be noted that, for completeness, the present invention is applicable in various types of shaving devices.

  The shaving device 1 has a main body 2 and a shaving head 3 on which several cutting members 4 are arranged. The main body 2 is intended to be held by the user of the shaving apparatus 1, and the cutting unit 4 is arranged with respect to the skin to be the object of the shaving operation in order to actually perform the shaving operation. Is intended. In the example shown, the shaving head 3 has three cutting units 4.

  Each cutting unit 4 includes an external cutting member 5 having a cap-like shape having an external skin contact surface 6 and an opening 7 for passing hair through the cutting unit 4, and an internal part of the cutting unit 4 at an appropriate support portion. An internal cutting member (not shown) having a number of cutting blades disposed in the space and configured to cut hair. During the operation of the shaving device 1, the support with the cutting blade is driven to rotate. For this purpose, the shaving device 1 may comprise any suitable drive means (not shown) such as a small electric motor.

  The operation of the shaving device 1 having a shaving head 3 having one or more cutting units 4 and each of the cutting units 4 having an external cutting member 5 and an internal cutting member as described above is as follows. It is as follows. When the shaving device 1 is used to perform a shaving operation, the user of the shaving device 1 moves the external cutting member 5 over a part of the skin to be subjected to the shaving operation, and the internal cutting member is externally cut. Driven to rotate at a position immediately behind the member 5. Due to the movement of the cutting unit 4 with respect to the skin, a continuous process occurs in which the hair is caught in the opening 7 of the external cutting member 5 and hits the cutting blade of the internal cutting member, so that the hair is cut.

  The shaving device 1 has a holding unit 8 that holds the cutting unit 4 and attaches the shaving head 3 to the main body 2. Furthermore, in the conventional situation as shown in FIG. 1, each of the cutting units 4 has a suspension ring 9 for realizing a pivotal connection between the external cutting member 5 and the holding part 8, where The inclined axis extends to the peripheral area of the cutting unit 4 on the side surface of the cutting unit 4 close to the central axis of the shaving head 3. By making the inclined shaft extend from the main body 2 to the external cutting member 5, the external cutting member 5 and the related internal cutting member follow a given curvature of the skin to be subjected to the shaving operation. Is made possible.

  The invention relates to a method in which the external cutting member 5 of the cutting unit 4 is suspended with respect to the holding part 8. FIG. 2 shows an embodiment of the shaving head 3 according to the invention. Compared to the conventional situation, each cutting unit 4 has two suspension rings 9, 10 instead of only one. In particular, there is a basic suspension ring 9 corresponding to the suspension ring 9 existing in the conventional situation. The basic suspension ring 9 is an outer ring that can be tilted around an inclined axis located in the peripheral region of the cutting unit 4. Inside the basic suspension ring 9, another suspension ring 10 is arranged in a concentric arrangement, and the external cutting member 5 is arranged in the suspension ring 10. The basic suspension ring 9 is pivotally connected to the holding part 8, and an additional suspension ring 10 (also referred to as end suspension ring 10) is pivotally connected to the basic suspension ring 9.

  In FIG. 3, the configurations of the external cutting member 5 and the suspension rings 9 and 10 are clearly shown. In the concentric arrangement described above, the suspension rings 9, 10 are connected to each other at two points located on an imaginary straight line passing through the center of the concentric arrangement, thereby obtaining a pivotal connection between the suspension rings 9, 10. It is done. For the sake of completeness, it should be noted that in the schematic diagram in FIG. 3, details such as the opening 7 in the skin contact surface 6 of the external cutting member 5 are not shown.

  FIG. 4 shows the various degrees of freedom of movement of the cutting unit 4 obtained when at least one additional suspension ring 10 is applied to suspend the external cutting member 5 relative to the holding part 8. First, the holding part 8 is configured to allow rotational movement relative to the body part 2 shown only partially in FIG. 4 about two vertical tilt axes a, b. Secondly, the basic suspension ring 9 can be tilted with respect to the holding portion 8 around the tilt axis c. In the illustrated example, the tilt axis c extends substantially parallel to one of the tilt axes a and b of the holding portion 8. Thirdly, in the illustrated example, the end suspension ring 10 has an inclination axis d extending substantially parallel to one of the inclination axis c of the basic suspension ring 9 and the inclination axes a and b of the holding portion 8. It can be tilted around the basic suspension ring 9. Furthermore, FIG. 4 shows that, in the illustrated example, the tilt axis c of the basic suspension ring 9 has an eccentric position with respect to the cutting unit 4 and the external cutting member 5, while the tilt axis d of the end suspension ring 10. It clearly shows that the relative position described above is the center position. Fourth, the external cutting member 5 is in relation to the end suspension ring 10 around an inclination axis e which extends perpendicular to the inclination axes c, d of the basic suspension rings 9, 10 in the illustrated example. And can be tilted.

  In view of the overall configuration of the shaving device 1 and the desired application of the shaving device 1, it will be understood that only a limited range of tilting movement of the holding part 8 and the suspension rings 9, 10 is required. For example, the tilting movement of the holding unit 8 may be within a range of 10 ° from the predetermined position of the holding unit 8 in two opposite rotation directions, and the tilting movement of the basic suspension ring 9 is In the rotational direction only, it may be within a range of 10 ° from the default position of the basic suspension ring 9, and the tilting movement of the end suspension ring 10 will cause the end suspension ring 10 to move in two opposite rotation directions. It may be within a range of 7 ° from the predetermined position.

  In the shaving device 1 according to the present invention, the degree to which the contour of the skin to be subjected to the shaving operation is improved is improved. In this respect, an important feature in a suspension configuration in which there are at least two members 9, 10 that can be tilted with respect to each other is that the rigidity of the pivotal connection of the suspension members 9, 10 with respect to each other depends Is less than the stiffness of the pivot connection to 8. Therefore, the momentum required to rotate the end suspension member 10 is significantly lower than the momentum required to rotate the basic suspension member 9. The advantage of this fact is that excellent contour following performance is obtained at two levels, i.e. at the level of a region of relatively small contour change and at the level of a region of relatively large contour change. The member 10 is a member that can mainly cover the former region, and the basic suspension member 9 is a member that mainly can cover the latter region.

  Another factor that contributes to contour tracking is having an inclined axis close to the skin level. In the illustrated example, the inclination axis d of the end suspension ring 10 with respect to the basic suspension ring 9 is closer to the skin level than the inclination axis c of the basic suspension ring 9 with respect to the holding part 8. Based on this fact, contour following is improved for situations where only the basic suspension ring 9 is present, i.e. where the end suspension ring 10 is omitted. When the tilt axis is close to the skin level, the degree to which the external cutting member 5 slides on the skin during rotation of the members 9, 10 about the tilt axis is reduced and the sensitivity to frictional forces is also reduced.

  The tilt axes c, d of the various suspension members 9, 10 may be parallel as in the illustrated example, but may have different orientations and may even be perpendicular to each other. Another possibility is that there are more than two suspension members 9, 10 and the end suspension member 10 and the intermediate suspension member behind it may be tiltable in a vertical direction. If the pivoting connection is realized in different directions, the ability to follow the contour in the different directions is obtained, which is an improved contour following for the case of mobility in only a few directions.

  5 and 6 show a first alternative design of the cutting unit 4. Compared to the design of the cutting unit 4 shown in FIGS. 2 to 4, the shape of the end suspension member 10 has changed. In particular, when viewed from the side where the cutting unit 4 and the skin come into contact with each other, the portion 11 of the end suspension member 10 is shaped to cover a part of the underlying basic suspension member 9. In the illustrated example, the portion 11 is a portion on the side of the end suspension member 10 facing away from the center of the shaving head 3.

  When this alternative design of the end suspension member 10 is used, the manner in which the feel of the shaving unit 4 is experienced by the user of the shaving device 1 is improved. The reason is that the enlarged portion 11 of the end suspension member 10 provides a smooth skin contact surface and covers the length of the transition between the end suspension member 10 and the basic suspension member 9, thereby This is because contact with the skin is prevented. In this way, the possibility of smooth movement on the skin of the external cutting member 5 and the surrounding structure is improved.

  7, 8 and 9 show a second alternative design of the cutting unit 4. According to this design, the end suspension member 10 can completely cover the basic suspension member 9, so that there is no longer any transition between the suspension members 9, 10 where contact with the skin can occur. .

  The scope of the invention is not limited to the examples discussed above, and several variations and modifications are possible without departing from the scope of the invention as defined in the appended claims. It will be apparent to those skilled in the art. While illustrated and described in the drawings and the foregoing description, such description and description are to be considered illustrative or exemplary and not restrictive. The invention is not limited to the disclosed embodiments.

  Variations to the disclosed embodiments can be understood and implemented by those skilled in the art implementing the claimed invention upon reading the drawings, the description and the appended claims. In the claims, the word “comprising” does not exclude other elements or steps, and the indefinite article “a” or “an” does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measured cannot be used to advantage. Any reference signs in the claims should not be construed as limiting the claim.

  The design of the cutting unit 4 of the shaving device 1 according to the invention shown in the drawing, i.e. the design with the suspension members 9, 10 having concentric rings, allows a compact structure of the cutting unit 4. Please keep in mind. However, it is possible for the suspension members 9, 10 to establish a connection between the holding part 8 and the external cutting member 5, the position of the connection of the suspension members 9, 10 with respect to the holding part 8 and the two suspension members 9, Other shapes and configurations of the suspension members 9, 10 are also possible as long as there is a pivot connection both at the location where the 10 are connected to each other and the pivot stiffness of the latter connection is lower than the pivot stiffness of the former connection. It is feasible. When the suspension means of the shaving unit 4 has more than two suspension members, the rigidity of the pivot structure of the suspension member at a level away from the holding portion 8 of the shaving device 1 is higher than at a level close to the holding portion. Low is important.

  It should be noted that the cutting unit 4 may be configured to be detachable from the main body 2 of the shaving device 1 for completeness. For example, the user may be able to remove the entire shaving head 3 from the main body 2 for the purpose of cleaning. Here, the connection between the shaving head 3 and the main body 2 can be easily detached. It may be realized in any suitable manner.

  In a shaving device having more than one cutting unit 4, the pivoting stiffness of the pivoting structure can be different for each cutting unit 4. In other words, the pivot stiffness of a pivot structure of one cutting unit 4 need not be equal to the pivot stiffness of a similar pivot structure of another cutting unit 4. However, in the shaving apparatus 1, it is preferable that all the cutting units 4 are configured according to the present invention, that is, as described above, the cutting units at positions away from the holding portion 8 of the shaving device 1. The rigidity of the pivot structure of the suspension member 4 is preferably lower than at the level closest to the holding part 8.

  The present invention can be summarized as follows. The shaving head 3 for use in the shaving device 1 has at least one cutting unit 4 in which an external cutting member 5 and an internal cutting member are arranged. In particular, the internal cutting member is configured to be movable, and the internal cutting member is configured to perform a cutting action on the hair as it moves relative to the hair. The external cutting member 5 functions to contact the skin to be subjected to the shaving operation and pass hair from the skin to the internal cutting member. For this purpose, the outer cutting member 5 may have a cap-like shape covering the inner cutting member, and the cap comprises an opening 7.

  In addition to the cutting unit 4, the shaving head 3 has a holding unit 8 for mounting the cutting unit 4 on the main body 2 of the shaving device 1. For the purpose of suspending the external cutting member 5 with respect to the holding part 8, a suspension means is provided. According to the present invention, as described above, the suspension means has at least two pivot structures, and one pivot structure allows the members of the suspension means to pivot with respect to the holding portion. This pivot structure allows the external cutting member to pivot relative to the pivot member. Furthermore, the pivotal stiffness of the latter pivotal structure connection is lower than the pivotal stiffness of the former.

  Based on the characteristics of the suspension means described above, skin contour tracking is improved, and excellent contour tracking performance is obtained at two levels: the level of the region of relatively small contour change and the level of the region of relatively large contour change. It is done.

Claims (15)

A shaving head for use in a shaving apparatus for removing the hair from the skin by cutting the hair, comprising at least one cutting unit and a holding part for holding the cutting unit The holding portion is configured to be attached to a main body portion of the shaving device, and the main body portion is configured to be held by a user of the shaving device and accommodates various members of the shaving device. Function as
The cutting unit is configured to contact the skin during a shaving operation and has an external cutting member having a surface with an opening for passing hair;
The cutting unit further comprises an internal cutting member that is drivable for movement along the opening in the surface of the external cutting member and is configured to cut hair during such movement. The external cutting member is suspended from the holding portion by suspension means, and the suspension means is
A suspension member;
A first pivot structure enabling the suspension member to pivot with respect to the holding portion;
A second pivoting structure enabling the outer cutting member to pivot with respect to the suspension member;
A shaving head having a pivotal rigidity of the second pivot structure lower than that of the first pivot structure.   The pivot stiffness of the pivot structure is related to the threshold of tilt momentum that needs to be applied before the tilt movement, and from the predetermined rest position of the pivot structure, the tilt angle is actually reduced by the pivot structure. The shaving head of claim 1, wherein the shaving head can be implemented and the threshold for the second pivot structure is lower than the threshold for the first pivot structure.   The suspension member is a first suspension member, and the external cutting member is a part of the suspension member and is pivotable relative to the first suspension member by the second pivot structure. The shaving head according to claim 1, which is fixedly attached to the suspension member.   4. The shaving head of claim 3, wherein the suspension member has rings connected to each other in a concentric arrangement at two locations that define an axis of inclination of the suspension member relative to each other.   The shaving head according to claim 3, wherein the second suspension member covers at least a part of the first suspension member, and the covered portion is prevented from coming into contact with skin.   The shaving head according to claim 1, wherein tilt axes of the first pivot structure and the second pivot structure extend at different levels with respect to the skin contact surface of the external cutting member.   The shaving head according to claim 6, wherein the tilt axis of the first pivot structure is at a level farther from the level of the skin contact surface of the external cutting member than the tilt axis of the second pivot structure. .   The shaving head according to claim 1, wherein tilt axes of the first pivot structure and the second pivot structure extend in different directions. The tilt axis of the first pivot structure extends to the periphery of the outer cutting member, the tilt axis of the second pivot structure extends in center of the said external cutting member, claim The shaving head according to 1.   The suspension member is a first suspension member, and the external cutting member is pivotable with respect to a second suspension member that is part of the suspension means by a third pivot structure, The second suspension member is pivotable with respect to the first pivot member by the second pivot structure, the pivot stiffness of the second pivot structure and the third pivot structure. The shaving head of claim 1, wherein both of the pivot stiffnesses of the first pivot structure are lower than the pivot stiffness of the first pivot structure.   The shaving head according to claim 10, wherein the pivot stiffness of the second pivot structure and the pivot stiffness of the third pivot structure are substantially equal to each other.   The shaving head according to claim 10, wherein the tilt axes of the second pivot structure and the third pivot structure extend in different directions.   The shaving head according to claim 1, wherein the internal cutting member is configured to be rotatable.   A shaving device for removing the hair from the skin by cutting the hair, the body being configured to be held by a user of the shaving device and functioning to accommodate various members of the shaving device A shaving apparatus having a portion and the shaving head according to claim 1.   The shaving head has at least two cutting units, and means for driving an internal cutting member of the cutting unit includes a gear for each cutting unit, and a central gear for driving the wheels of the cutting unit. The shaving device according to claim 14, wherein, in each of the cutting units, the tilt axis of the suspension member extends in a region where the wheels of the cutting unit engage with the central wheel.

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